Re: [time-nuts] LAST CALL for Symmetricom 58532A antennas

I bought two and the shipping was $12 within the US. Sent via the Samsung GALAXY S5 Original message From: Philip Pemberton Date: 01/18/2016 10:53 AM (GMT-08:00) To: Discussion of precise time and frequency measurement

[time-nuts] May have asked before - any one have a dead 5061 Cs tube you don't want ?

Dead as in out of Cs, but not damaged. -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] Generating a solid PPS from 10Mhz source

The nice thing about a FPGA (or CPLD) is that they come with a cute timing analyzer. You can indeed answer questions like this with a quite high level of confidence. That *assumes* that you bother to set up the timing analyzer :) That true. Its nice looking "Timeng report". I saw the numbers

Re: [time-nuts] Generating a solid PPS from 10Mhz source

On Monday, January 18, 2016 08:45:20 PM you wrote: > > > In message <29659871.S9XTlaFu4r@linux>, Bruce Griffiths writes: > >To detect 100Hz modulation due to photocurrents in the LEDs the 150W > >incandescent bulb had to be placed within a few cm of the LEDs. > > Incandescent bulbs

Re: [time-nuts] Generating a solid PPS from 10Mhz source

On 1/18/16 4:19 PM, Bob Camp wrote: Hi Some time - check out what a “60 Hz” incandescent bulb looks like when hooked to 20 Hz …. flicker flicker flicker … I suspect they optimize the thermal mass of the filament to reduce the flicker at 50/60 Hz. They optimize that to a tiny fraction of a

Re: [time-nuts] LAST CALL for Symmetricom 58532A antennas

Since I have been out of this loop for many years What is the "advantage" of one of these antennas over a common turnstile with a short feed line If I were to buy where do I order? I have no clue who David Zolden is or how to contact him? Dave NR1DX ArtekManuaLs.COM On 1/18/2016 1:53

Re: [time-nuts] Generating a solid PPS from 10Mhz source

On Mon, 18 Jan 2016 20:45:20 +, you wrote: >Incandescent bulbs don't have much "hum" in their light output, >they're basically heating elements and they don't cool down nearly >fast enough. Hook photocell to an audio amp and shine a 60Hz powered lamp on it; you'll be surprised. I don't know

[time-nuts] PRS10 C900 replacement

Hi All, While still appearing to function normally, my PRS10 started to smell: C900 in the lamp assembly has self destructed. The SRS parts manual merely says "Capacitor, Tantalum, 35V, 20%, Rad", so I'd appreciate any advice on what additional parameters I should be looking at in selecting

Re: [time-nuts] Generating a solid PPS from 10Mhz source

Hi If you fire up the FPGA and measure it, you will find a sub picosecond jitter on a signal passing through it. If you use the internal PLL or DLL in an FPGA, you might indeed see close to 1x10^-12 ADEV in some cases. In general you should be able to get into the parts in the 10^-13 range

Re: [time-nuts] Generating a solid PPS from 10Mhz source

The clock to output delay of the PIC will be similar or perhaps a little worse. You seem to be confusing delay and jitter. There are zero delay buffers (in the sense that the output transitions are aligned with the clock transitions) but these have excessive jitter due to the internal DLL used

[time-nuts] HP 5372A advice

Hi all, I recently was fortunate enough to obtain one of these amazing instruments but regrettable no copy of the main operating manual. I find myself a bit puzzled by some of it's behaviour. The unit is clean and passes all the self-tests. When I first got it it seemed to work very nicely

Re: [time-nuts] PRS10 C900 replacement

You will need to know the capacitance value. Usually expressed in uF (micro Farad). Then some idea of the physical size, so the replacement will fit in the current space. --- Graham == On Tue, Jan 19, 2016 at 4:21 PM, davidh wrote: > Hi All, > > While still appearing to

Re: [time-nuts] LAST CALL for Symmetricom 58532A antennas

Hi Ok…at least part of the answers: > On Jan 19, 2016, at 12:57 PM, Artek Manuals wrote: > > Since I have been out of this loop for many years > > What is the "advantage" of one of these antennas over a common turnstile with > a short feed line 1) They have the

Re: [time-nuts] PRS10 C900 replacement

Hi, You need one more piece of info: its value! E.g. 1uf, 0.35uF, 2.2uF, 10uF? That is quite important :) Just don't use too old tantalum caps - they tend to absorb moisture over time (when stored incorrectly) - and self destruct as you have experienced.. I just experienced the same while

Re: [time-nuts] PRS10 C900 replacement

Folks, It's a 2.2uF cap, with a 0.125" lead spacing, and I'm looking for 125dC temp rating. I wondered if there were other characteristics such as ESR/ESL I need to keep in mind. d. On 20 Jan 2016 14:32, Dan Harboe Burer wrote: Hi, You need one more piece of info: its value! E.g. 1uf,

[time-nuts] Thinderbolt 10 Mhz output level?

Has anyone actually measured the 10 Mhz level on their thunderbolt? More than +10 dbm? Thanks Chris ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the

[time-nuts] Pendulum clocks based on John Harrison's writing

http://www.theatlantic.com/technology/archive/2016/01/pendulum-clock-john-harrison/424614/ |The contemporary British clockmaker George Daniels has called the text |“rubbish”; Rupert Gould, the author of the biography Burgess |read, described it as “gibberish.” | |Burgess disagreed.

Re: [time-nuts] HP 5372A advice

Hi Morris, On 01/20/2016 03:48 AM, Morris Odell wrote: Hi all, I recently was fortunate enough to obtain one of these amazing instruments but regrettable no copy of the main operating manual. I find myself a bit puzzled by some of it's behaviour. I strongly advice you to download the

Re: [time-nuts] Generating a solid PPS from 10Mhz source

Hi Some time - check out what a “60 Hz” incandescent bulb looks like when hooked to 20 Hz …. flicker flicker flicker … I suspect they optimize the thermal mass of the filament to reduce the flicker at 50/60 Hz. Bob > On Jan 18, 2016, at 3:45 PM, Poul-Henning Kamp wrote: